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Loren Pickart, who pioneered much of the research, suggested that GHK-Cu levels decrease significantly with age (1), although the exact extent of this decline varies across studies
Applying AHK-Cu and immediately lying on a pillow transfers product to fabric instead of keeping it on your scalp
However, persistent burning, stinging, or increasing irritation suggests the concentration may be too high or your skin needs more time to adjust
Correcting a deficiency is crucial, but it brings up a common question: are oral supplements or injections the better choice
The most effective approach pairs a carefully selected peptide with sleep, nutrition, and hormone support
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